What is Image Compression?
In the field of image processing, image compression is an important step before starting to process larger images or videos. Image compression is carried out by an encoder and generates a compressed form of an image. In compression processes, mathematical transformations play a vital role. A flow chart of the image compressor process can be represented as: In this article, we try to explain the overview of the concepts involved in image compression techniques. The general representation of the image on a computer is as a vector of pixels. Each pixel is represented by a fixed number of bits. These bits determine the intensity of the color (grayscale for a black and white image and has three RGB channels for color images). Why do we need image compression? Consider a black and white image that has a resolution of 1000 * 1000 and each pixel uses 8 bits to represent intensity. So the total number of bits required = 1000 * 1000 * 8 = 80,00,000 bits per image. And consider if it is a video